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Home Forums 68kMLA Macintosh Portable Slot Hackage — #10
Post #10 by Trash80toHP_Mini
Source Forum68kMLA
Category68k
Post DateFri, 21 Jun 2013 - 05:10
Original URLhttps://68kmla.org/bb/threads/macintosh-portable-slot-hackage.28307/
Post
Dunno, G. :-/

AFAIK, these old Accelerators merely take over for the MoBo CPU when the Init tells the 68000 to turn itself off and then the more capable CPU boots to the same memory mapping in the ROMs as the host processor would. The card in question has no problems with the memory mapping differences between SE, Plus and Classic, so I don't see that as an immediate concern. The 68030 is very capable in terms of memory management, knocking another card together for running Compact Virtual would be the second or third of the Portable Slot Hackage windmills.

The accelerators are asynchronous as regards the system bus, they've got their own clock on board and I'm not quite sure why the accelerator should give a hoot about what the clock of the host system might be. If its CPU bus calls get answered twice as fast as expected, that can't be nearly as bad as if they were answered half as fast as required.

After I noodle out any signal tweaks that might be required, maybe we'll have a chance to find out. I'm a bit bored with the SuperIIsi™ now that I've knocked over the largest and most annoying of its windmills. I have my Rocket up and running under RocketShare 1.0 on the unsupported IIsi.

I need another impossible dream, so this is the replacement Quixotic Quest . . . . and hacking something considered sacrosanct has its own rewards! }:)

The worst case scenario would be learning a couple of different ways NOT to play nicely with the Luggable's PDS Slot. :o)

mp.ls